Exerchain vs 0zone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Exerchain
This health app uses AI to forecast your weight 1, 3, and 6 months into the future. It automatically logs activity, sleep, and body composition from supported devices, and allows manual meal entry for accurate predictions. Gain insights and personalized routines based on your unique data.
- AI-powered weight prediction (1, 3, 6 months)
- Automatic activity, sleep, and body composition logging
- Manual meal entry for accurate forecasting
- AI insights and personalized routines
- Syncs with ExerRing, ExerScale, and popular smartwatches
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EXERCHAIN is a health app that predicts your future weight — 1, 3, and 6 months ahead — based on your real-life data. It automatically logs your activity, sleep, and body composition with supported devices, while meals can be entered manually for accurate forecasting. Get daily predictions, AI insights, and soon, personalized routines powered by your own data. [Key Features] - AI-Powered Weight Prediction (1, 3, 6 months) - TDEE-Based Forecasting Engine - Integrated logging of activity, sleep, and diet (auto + manual) - Actionable AI Insight Comments - Sync with ExerRing & ExerScale - Also compatible with Apple Watch, Fitbit, Galaxy Watch - Personalized routine & AI health reports (coming soon) [Device Overview] ExerRing: 24/7 tracking of heart rate, activity, sleep, and recovery ExerScale: Precise measurement of over 45 body composition metrics ※ You must use at least one device (ExerRing or ExerScale) to activate the app features EXERCHAIN is more than just a tracker. It builds a behavior-changing loop: Prediction → Insight → Action → Transformation YOUR DATA, YOUR MOVE. — * Access Information * [Required] - HealthKit access - Heart rate to monitor and generate accurate workout information - Resting heart rate to provide accurate workout statistics - Motion & Fitness - Monitor user's movements - To provide more accurate steps data - Statistics on walking based on steps data [Optional] - Location: Location based service provided - Notification: Push messages from ExerChain(warning: alert, badges may be included) - Camera: for profile images and to record workouts - Photos, media, files: for profile images and to record workouts
0zone
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Create your custom workout for Apple Watch. Scheduled workout will be shown in your Apple Watch's Workout application.
Screenshots
Verdict
The clearest difference is update cadence: 0zone at every 3 days against Exerchain's monthly. Exerchain's advantage is iOS requirement (16.2 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Exerchain ships an update monthly, 0zone every 3 days. The most recent releases landed on July 26, 2026 and September 17, 2026 respectively.
| Parameter | Exerchain | 0zone |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (12 ratings) — better | — |
| Positive reviews | 27.3% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Monthly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 16.2 — better | 18.0 |
| Further details — not scored | ||
| Size | 73 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Exerchain | Sang Min Kim |
In-app purchases
Exerchain
No in-app purchases
0zone
No in-app purchases









